public async Task GetPlayListsAsyncShouldReturnPlayLists() { //arrange PlayList playList = new PlayList(); _mixBLMock.Setup(i => i.GetPlayListsAsync()); PlayListController playListController = new PlayListController(_mixBLMock.Object); //act var result = await playListController.GetPlayListsAsync(); //assert Assert.IsType <OkObjectResult>(result); }